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用jsphtml:file实现一个文件上传的例子，而且有验证

發布時間：2025/3/15 编程问答 16 豆豆

生活随笔收集整理的這篇文章主要介紹了用jsphtml:file实现一个文件上传的例子，而且有验证小編覺得挺不錯的,現在分享給大家,幫大家做個參考.

file.jsp代碼:

<script type="text/javascript">
??function subForm()
??{???
????? var str = document.FileUploadForm.file.value;
???var str2 = str.split(".");
???var str3 = str2[str2.length-1];
???
???if(str3.toUpperCase()=='JPG'||str3.toUpperCase()=='GIF')
???{
?????? return true;
??????
???}else
???{
????? alert('上傳文件類型不對！');
????? return false;
???}
??}
?</script>
? </head>
?
? <body>
?? <html:form action="/FileUpload" enctype="multipart/form-data" οnsubmit="return subForm()">
?? 選擇上傳的文件:<html:file? property="file"></html:file><br/>
?? <html:submit></html:submit>
???
?? </html:form>
? </body>
</html:html>

form bean 文件:FileUploadForm

/*
?* Generated by MyEclipse Struts
?* Template path: templates/java/JavaClass.vtl
?*/
package com.bluedot.web.forms;

import javax.servlet.http.HttpServletRequest;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.upload.FormFile;

public class FileUploadForm extends ActionForm {
?private FormFile file;
?public FormFile getFile() {
??return file;
?}

?public void setFile(FormFile file) {
??this.file = file;
?}

?public ActionErrors validate(ActionMapping mapping,
???HttpServletRequest request) {
??// TODO Auto-generated method stub
??return null;
?}

?
?public void reset(ActionMapping mapping, HttpServletRequest request) {
??this.file = null;
?}
}

Action:代碼
FileUploadAction

/*
?* Generated by MyEclipse Struts
?* Template path: templates/java/JavaClass.vtl
?*/
package com.bluedot.web.actions;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.upload.FormFile;

import com.bluedot.web.forms.FileUploadForm;

public class FileUploadAction extends Action {
?
?public ActionForward execute(ActionMapping mapping, ActionForm form,
???HttpServletRequest request, HttpServletResponse response) {
??FileUploadForm f = (FileUploadForm)form;
??FormFile file = f.getFile();
??byte[] result = null;
???String path = "/upload/"+file.getFileName();
???String realpath =getServlet().getServletContext().getRealPath(path);
???try {
?????result = file.getFileData();
?????File aa = new File(realpath);
?????if(!aa.exists())
?????{
??????aa.createNewFile();
?????}
????FileOutputStream fos = new FileOutputStream(aa);
????fos.write(result);
????return mapping.findForward("fileok");
???} catch (Exception e) {
????// TODO Auto-generated catch block
????e.printStackTrace();
????return mapping.findForward("error");
???}
???
??
?}
}

轉載于:https://www.cnblogs.com/rong2009/archive/2009/08/07/1540926.html

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